Antonyms of adv insincerely

1 sense of insincerely

Sense 1
insincerely -- (without sincerity; "she congratulated him somewhat insincerely")
       Antonym of sincerely (Sense 1)
      => sincerely, unfeignedly, truly -- (with sincerity; without pretense; "she praised him sincerely for his victory"; "was unfeignedly glad to see his old teacher"; "we are truly sorry for the inconvenience")

Synonyms of adv insincerely

1 sense of insincerely

Sense 1
insincerely -- (without sincerity; "she congratulated him somewhat insincerely")